My brother is supposed to be helping me on this but hes too busy all the time. So which GPU is best for me?
first, replace the psu with something that won't kill your pc. may be antec neo eco 520w or corsair builder cx 500 v2 or seasonic s12ii 520w.
what are you going to use this pc for? what is your max budget for everything?
second, is this a new pc? if yes, why not sell the parts and build a pc with newer parts (sandy bridge etc)?
if you're keeping the parts, then get a radeon hd 7750 or 6670 1 gb after you replace the psu.
De5_roy is correct. You want to avoid the "free trap". For example, you could end up spending $500 on the other parts and then discover that if you had tossed the free CPU and bought a newer one (like the i3-2100) and have a much better computer for $650.